What was found
CLIMBING THROUGH 15,000 FT THE BLEED TRIP OFF LIGHT FOR THE NR 2 ENGINE ILLUMINATED. PERFORMED QRH CHECKLIST, RETURNED TO KWA. OVER-WEIGHT LANDING AT 131.2 K, LOW TO MEDIUM SINK RATE. VERIFIED NR 2 ENGINE BLEED TRIP ON THE GROUND. REMOVED AND REPLACED PRE-COOLER CONTROL VALVE AND PRE-COOLER CONTROL VALVE SENSOR. OPS CHECK GOOD AT 90 PERCENT N1 WITHOUT BLEED TRIP. COMPLETED OVERWEIGHT LANDING INSPECTION PHASE I IAW AMM 05-51-35-2. NO DEFECTS NOTED. AIRCRAFT RETURNED TO SERVICE. FLIGHT VERIFICATION OKAY; CONTINUED FLIGHT.